Here is the full list of all 29 Edna & Harvey: Harvey's New Eyes achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Defeat the Mother Superior.
How's that supposed to help?
Multiple endings? I need to see 'em all.
Finish chapter three.
Defeat all Harveys.
I hate mini games!
If in doubt - give him a clout!
Droggeljug!
I hear someone singing ...
Sleep!
Did someone here order a pizza?
They don't really have quicktime events in this game, right?
Row, kid! Row for your life!
Finish chapter two.
Hoo hoo. Whit woo. Terwit terwoo.
Find the right path.
Justice prevails.
That doesn't apply to me.
I need more coffee! More!
Aaaargh!
Even the sun follows my command!
I think I've been here before ...
Floating in the summer sky.
X marks the spot.
Shibuya power!
Lilli's arms were too short.
I don't need no tutorial!
Finish chapter one.
Help the old man.